#!/usr/bin/env node

const pi = Math.PI;

class Circle{
  constructor(radius){
    this.#r=radius;
  }
  get diameter(){
    return 2 * this.#r;
  }
  get circumference(){
    return 2 * this.#r * pi;
  }
  get area(){
    return pi * this.#r * this.#r;
  }
  #r=0;
}
module.exports=Circle;

console.log('\nmodule:',module);


